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CERN opened in 2002, the CAST (European Organization for Nuclear Research's Axion Solar Telescope), built to search for axions thought to be produced when infared scale photons scatter from electrons and protons in the Sun's core. Detection of these would represent evidence for a new branch of physics based on axions. CAST has a 10 meter long magnet that produces a field of up to 9 Tesla (http://en.wikipedia.org/wiki/Tesla_%28unit%29) to convert axions to X-rays. X-ray detectors watch for converted axions.
The telescope observes for three hours a day, one hour at sunrise, one
hour at sunset, and one hour pointing away from the sun to measure background.
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